The actress/director signed on to co-write the screenplay with her partner, Noah Baumbach, in 2019, and it was reported at the time she was considering stepping behind the camera for the project.
Now Margot has confirmed Greta will helm the project in a new interview with Vogue UK, stating, "People generally hear Barbie and think, 'I know what that movie is going to be', and then they hear that Greta Gerwig is writing and directing it, and they're like, 'Oh, well, maybe I don't...' "
Robbie, who replaced Amy Schumer in the new take on the classic Mattel toy, previously warned fans her portrayal of Barbie would not present the doll as simply a cute blonde.
The "I, Tonya" star, who is also producing the project, told The Hollywood Reporter, "It will be something totally different... a little left of centre... Our goal is to be like, 'Whatever you're thinking, we're going to give you something totally different - the thing you didn't know you wanted.' "
The film centres on Barbie being expelled from Barbie Land for failing to live up to expectations and is expected to begin production next year (22).
The project has been in the works for a long time. When Margot Robbie was first cast for the lead role, "Wonder Woman" director Patty Jenkins was rumored to sit behind the lens.
Before the Harley Quinn depicter was confirmed for the movie, Anne Hathaway was once linked to the role.